Zoo Atlanta staffers say Ya Lun and Xi Lun are doing extremely well, and now weigh more than 10 pounds each. The cubs get regular vet checkups, during which their general health is assessed and the sisters are carefully measured so that doctors can keep a close eye on their progress. Zoo Atlanta Curator of Mammals Dr. Stephanie Braccini says in just a few weeks, the cubs will likely be a little bit too strong to keep still for exact measurements, but that the regular health checks will continue. As with other panda cubs born at Zoo Atlanta, Ya Lun and Xi Lun will eventually be moved to China.